Hex #99a922 or rgb(153,169,34) in RGB space is the tint of yellow. It has hue angle of 67.11 degrees, value = 66 and saturation = 80. #99a922 can be obtained by mixing 4 colors: 5 drops of yellow, 1 drop of red, 2 drops of blue, 2 drops of green.
Nearest safe hex - #999933. Below you can see the block with #99a922 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99a922 to the mixer and play with it.